Re: [gentoo-user] resizing multiple images with adding a frame as needed

[hw]

Am 24.06.2015 um 07:35 schrieb Mick:
> On Wednesday 24 Jun 2015 01:02:35 wabenbau@×××××.com wrote:
>> hw <hw@×××××××××××××××××××××.de> wrote:
>>> Hi,
>>>
>>> suppose I have a number of images that need to be displayed side by
>>> side in a nice layout.  The images are of different sizes and have
>>> different aspect ratios.
>>>
>>> To fit the images into the layout, I can scale the images either by
>>> height or width or by percantage, and they will look messy in the
>>> layout because I need to keep their aspect ratio when scaling them.
>>>
>>> So what I need to do is put a frame around each image just as needed
>>> when scaling it so that I will end up with all the images having the
>>> same size while maintaining their aspect ratio.
>>>
>>> I guess 'convert' (from imagemagick) or 'ffmpeg' can do this, yet I
>>> couldn't find out how.
>>>
>>>
>>> (In this particular case, I would set a default size to scale all
>>> images to rather than doing something more complicated like examine
>>> all images in advance to compute a good size to use from the largest
>>> or smallest one or from their average dimensions.)
>>>
>>>
>>> Any ideas how to do this?
>>
>> Look here:
>>
>> http://stackoverflow.com/questions/1787356/use-imagemagick-to-place-an-imag
>> e-inside-a-larger-canvas
>>
>> You must add a resize paremeter as this example is only for placing an
>> image inside a larger canvas. :-)
>>
>> You can easily find more examples in the Internet.
>>
>> --
>> Regards
>> wabe
>
> Give this a spin, or modify accordingly to suit your needs:
>
> ============================================
> #!/bin/bash
> for i in *.JPG; do
>    name=${i%.JPG}
>    convert -resize 900x675 ${i} ${name}_s.jpg
> done
> ============================================

This doesn't add a frame to keep the aspect ratio, or does it?